package com.risenb.controller;

import java.io.File;
import java.text.SimpleDateFormat;
import java.util.Arrays;
import java.util.Date;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Random;

import javax.servlet.ServletContext;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.FileItemFactory;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

import com.risenb.constant.Const;
import com.risenb.util.BaseUtil;
import com.risenb.util.MapUtil;


@Controller
@RequestMapping("upload")
public class UploadController extends CustomerBaseControllor{
	
	@RequestMapping(value="file",method=RequestMethod.POST)
	public void uploadfile(HttpServletRequest request, HttpServletResponse response) throws Exception{
		String path = request.getContextPath();
		String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
		ServletContext application = request.getSession().getServletContext();
		String savePath = Const.UPLOADDIRECTORY;

		// 文件保存目录URL
		String saveUrl = "upload/";

		// 定义允许上传的文件扩展名
		HashMap<String, String> extMap = new HashMap<String, String>();
		extMap.put("image", "gif,jpg,jpeg,png,bmp");
		extMap.put("flash", "swf,flv");
		extMap.put("media", "swf,flv,mp3,wav,wma,wmv,mid,avi,mpg,asf,rm,rmvb");
		extMap.put("file", "doc,docx,xls,xlsx,ppt,htm,html,xml,sql,txt,zip,rar,gz,bz2,pdf");

		// 最大文件大小
		long maxSize = 10000000;

		response.setContentType("text/html; charset=UTF-8");

		if (!ServletFileUpload.isMultipartContent(request)) {
			returnJson(new BaseUtil("500", "请选择文件", "", "", "", "", ""));
			return;
		}
		// 检查目录
		File uploadDir = new File(savePath);
		if (!uploadDir.isDirectory()) {
			uploadDir.mkdirs();
		}
		if (!uploadDir.isDirectory()) {
			returnJson(new BaseUtil("300", "上传目录不存在。", "", "", "", "", "上传失败"));
			return;
		}
		// 检查目录写权限
		if (!uploadDir.canWrite()) {
			returnJson(new BaseUtil("300", "上传目录没有写权限。", "", "", "", "", ""));
			return;
		}

		

		FileItemFactory factory = new DiskFileItemFactory();
		ServletFileUpload upload = new ServletFileUpload(factory);
		upload.setHeaderEncoding("UTF-8");
		List items = upload.parseRequest(request);
		Iterator itr = items.iterator();
		while (itr.hasNext()) {
			FileItem item = (FileItem) itr.next();
			String fileName = item.getName();
			if (!item.isFormField()) {
				// 检查文件大小
				if (item.getSize() > maxSize) {
					returnJson(new BaseUtil("300", "上传文件大小超过限制。", "", "", "", "", ""));
					return;
				}
				// 检查扩展名
				String fileExt = fileName.substring(
						fileName.lastIndexOf(".") + 1).toLowerCase();
				String dirName = request.getParameter("dir");
				if (dirName == null) {
					dirName = MapUtil.getKey(extMap, fileExt, true);
				}
				if (!extMap.containsKey(dirName)) {
					returnJson(new BaseUtil("300", "目录名不正确。", "", "", "", "", ""));
					return;
				}
				// 创建文件夹
				savePath += dirName + "/";
				saveUrl += dirName + "/";
				File saveDirFile = new File(savePath);
				if (!saveDirFile.exists()) {
					saveDirFile.mkdirs();
				}
				SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMdd");
				String ymd = sdf.format(new Date());
				savePath += ymd + "/";
				saveUrl += ymd + "/";
				File dirFile = new File(savePath);
				if (!dirFile.exists()) {
					dirFile.mkdirs();
				}
				if (!Arrays.<String> asList(extMap.get(dirName).split(","))
						.contains(fileExt)) {
					returnJson(new BaseUtil("300", "上传文件扩展名是不允许的扩展名。\n只允许"
							+ extMap.get(dirName) + "格式。", "", "", "", "", ""));
					return;
				}

				SimpleDateFormat df = new SimpleDateFormat("yyyyMMddHHmmss");
				String newFileName = df.format(new Date()) + "_"
						+ new Random().nextInt(1000) + "." + fileExt;
				try {
					File uploadedFile = new File(savePath, newFileName);
					item.write(uploadedFile);
				} catch (Exception e) {
					returnJson(new BaseUtil("300", "上传失败", "", "", "", "", "上传文件失败。"));
					return;
				}

				Map<String, Object> msg = new HashMap<String, Object>();
				msg.put("error", 0);
				msg.put("url", saveUrl + newFileName);
				//WebUtil.writerJson(response, msg);
				returnJson(new BaseUtil("200", "上传完成", "", basePath + saveUrl + newFileName, "", "", ""));
			}
		}
	}
}
